I am kicking myself for not telling you last time that your top leaves are kinda thin i think the light is too close, i thought about it but shit i didn’t say it. You may have couple of problems, potassium deficiency, wind burn (if that fan is shaking the leaves it may burn because your grow area is too small and that fan could be too much at that distance point it to the side of your tent or directly to the light but don’t let it shake the leaves.
When it come to distance from the lights you have to get that light atleast 30-40 cm above the canopy, if you don’t have the space, tie the branches it is better than getting light burn.
Also i think you are feeding them too much nitrogen the leaves are very dark and this abundance of nitrogen could impede its ability to flower properly and promptly.